Top Performances Maxi TPR Cylinder-piston kitRef : TPF00225A / 1127337

Maxi kit TOP PERFORMANCES TPR: a cylinder kit designed for urban riders who want to optimise the responsiveness of their 50 cm³. This "Maxi Kit" combines a Ø 50 mm cylinder block, racing piston, and a disassembled cylinder head with a special full-plate connecting rod, 44 mm stroke, and specific balancing. The whole assembly aims to prioritise engine torque at low and mid-range speeds, for acceleration and handling suited to city traffic.

• Bore: 50 mm
• Stroke: 44 mm
• Displacement: 86.35 cm³
• Squish: 0.9–1.1 mm
• Geometric compression ratio: 14:1
• Effective compression ratio: 8.4:1
• Timing diagram: exhaust 192° / transfers 192°
• Recommended ignition advance: 16° (1 mm before TDC)
• Material: aluminium – racing piston

Installation and adjustments must be carried out by a qualified tuner or mechanic to ensure reliability. This kit is primarily aimed at 50 cm³ engines and is referenced for models such as DERBI SENDA X-TREME 50 SM (2022), GILERA SMT 50 (2020), and APRILIA SX 50 (2018). Manufacturer reference: 9934270.